CVE-2026-109765: Vulnerability in Mozilla Firefox
Description
Race condition, use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 4.2medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition and use-after-free issue within the Graphics: Text component of Mozilla Firefox. Such flaws can lead to memory corruption and potentially impact application stability or security. Mozilla has released fixes for this vulnerability in Firefox 158 and Firefox ESR 153.5.
Potential Impact
The vulnerability could allow unintended memory access or corruption due to the race condition and use-after-free flaw. However, no active exploitation has been reported. The impact is mitigated by the availability of official fixes.
Mitigation Recommendations
Users and administrators should update Firefox to version 158 or later, or Firefox ESR 153.5 or later, to remediate this vulnerability. Applying these official fixes fully addresses the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:37.689Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c4f2cdf04f65661d568
Added to database: 10/13/2026, 13:04:15 UTC
Last enriched: 10/13/2026, 13:19:51 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 8
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